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A surveyor uses a GNSS receiver with an RTK solution to accurately locate a parking stripe for a topographic survey. Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. [1]
The Networked Transport of RTCM via Internet Protocol (NTRIP) is a protocol for streaming differential GPS (DGPS) corrections over the Internet for real-time kinematic positioning. NTRIP is a generic, stateless protocol based on the Hypertext Transfer Protocol HTTP/1.1 and is enhanced for GNSS data streams.
Surveying data and maps are in Therion format. Auriga free software for Palm OS for in-cave surveying with bidirectional data exchange provided with Compass, Survex, Therion, GH Topo/Toporobot, VisualTopo and Walls. BCRA Cave Surveying Group, Compass Points 33. Short review of Therion and other survey software packages (German).
The roving antenna then applies those corrections to the GPS signals it is receiving to calculate its own position. RTK surveying covers smaller distances than static methods. This is because divergent conditions further away from the base reduce accuracy. Surveying instruments have characteristics that make them suitable for certain uses.
Free: up to 7 downloads; In-App purchase for unlimited downloads (also unlocks all of the features except for contour lines, hillshade maps and nautical depth contours) [12] No: Yes: No: No: Lane guidance; OsmAnd+: OpenStreetMap: Android, iOS: GNU GPLv2 (except some 3rd party libs and resources) Free: As OsmAnd~ on F-Droid; Paid: On Google Play ...
Precise positioning is increasingly used in the fields including robotics, autonomous navigation, agriculture, construction, and mining. [2]The major weaknesses of PPP, compared with conventional consumer GNSS methods, are that it takes more processing power, it requires an outside ephemeris correction stream, and it takes some time (up to tens of minutes) to converge to full accuracy.
DGPS Reference Station (choke ring antenna)A reference station calculates differential corrections for its own location and time. Users may be up to 200 nautical miles (370 km) from the station, however, and some of the compensated errors vary with space: specifically, satellite ephemeris errors and those introduced by ionospheric and tropospheric distortions.
Download as PDF; Printable version; ... Many GPS receivers can relay position data to a PC or other device using ... and surveying. RTK GPS provides centimeter-level ...